Shoe upper



FIG. 1 is a front perspective view of a portion of a shoe upper showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a medial side view thereof;

FIG. 5 is a lateral side view thereof; and

FIG. 6 is a top view thereof.

The uneven broken lines showing various regions and the remainder of the shoe is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a shoe upper, as shown and described. 